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Chlorophyll in Biological News

Engineering algae to make fuel instead of sugar

... tiny organisms, so as to minimize the number of chlorophyll molecules needed to harvest light without ... responsible for deploying approximately 600 chlorophyll molecules in the cell's light-gathering antennae. ... the paper's co-authors, argues that the algae's chlorophyll antennae help the organisms compete for sunlight ...

New technique enables assessment of drought performance

... Measurement of chlorophyll fluorescence is an effective way of determining ... National University who investigated whether chlorophyll fluorescence could be used in the assessment of ... (Fv/Fm), and that this was easily measurable by chlorophyll fluorometry." Other methods of assessing ...

Blue bananas

... the blue glow is connected to the degradation of chlorophyll that occurs during ripening. In this process, colorless but fluorescing breakdown products of chlorophyll are concentrated in the banana peel. The usual ... group, a modification never seen before in a chlorophyll breakdown product. This group has a stabilizing ...

Berkeley researchers identify photosynthetic dimmer switch

... II. Each complex features antennae made up of chlorophyll and carotenoid molecules that gain extra ... These zeaxanthin molecules interact with excited chlorophyll molecules and dissipate the excess energy via a ... into a radical cation which, unlike an excited chlorophyll molecule, is a non-oxidizing agent. However, ...

Researchers decode genetics of rare photosynthetic bacterium

... harvests far-red light by making a rare form of chlorophyll (chlorophyll d) has revealed its genetic secrets, ... marina, which through its production of chlorophyll d can absorb red edge, near infrared long ... Niche adaptation and genome expansion in the chlorophyll d-producing cyanobacterium Acaryochloris marina. ...

Researchers decode genetics of rare photosynthetic bacteria

... harvests far-red light by making a rare form of chlorophyll (chlorophyll d) has revealed its genetic secrets, ... marina, which through its production of chlorophyll d can absorb red edge, near infrared long ... Niche adaptation and genome expansion in the chlorophyll d-producing cyanobacterium Acaryochloris marina. ...

Bacterium sequenced makes rare form of chlorophyll

... by making an even rarer form of chlorophyll, chlorophyll d. chlorophyll d absorbs red edge, near infrared, long wave ... world sequenced thus far, and it is the first chlorophyll d containing organism to be sequenced . ...

Ripe fruit preferred

... has now determined that the breakdown of chlorophyll in ripening apples and pears produces the same ... decomposition products, called nonfluorescing chlorophyll catabolytes (NCC), are highly active ... time, no one really knew just what happens to the chlorophyll in this process. In recent years, Krutler and his ...

Leatherback turtles' newly discovered migration route may be roadmap to salvation

... the foundation for the ocean food chain. Thus, the relative abundance of chlorophyll is inferred to indicate the relative richness of a fishery. Satellite ... the fish are eating something and it's something we're not picking up in chlorophyll signatures from satellite imagery," he said. Given that leatherbacks ...

Researchers visualize complex pigment mixtures in living cells

... emission was most intense along the periphery of the cell whereas chlorophyll fluorescence was distributed more evenly throughout the cell, suggesting ... prevalent in the cell wall and also were present in thylakoids. Two chlorophyll fluorescence components also were resolved: the short-wavelength component ...

Iron isotopes as a tool in oceanography

... the oceans a major carbon dioxide sink, without which global warming would rapidly accelerate. The natural supply of iron to such 'High Nutrient Low chlorophyll (HNLC) regions is therefore, albeit indirectly, an important determinant of climate. The importance of dissolved iron in seawater derived from ...

Iron and biological production in the high-latitude North Atlantic

... despite the presence of residual nitrate. Experimental addition of iron to bottles containing seawater samples increased photosynthetic efficiency, chlorophyll concentrations, and growth of several types of phytoplankton, including the ubiquitous Emiliania huxleyi, a coccolithophore. "These results, ...

Pliable proteins keep photosynthesis on the light path

... system similar to photosystem II. The center stage of photosynthesis is the reaction center, where light energy is funneled into specialized chlorophyll binding proteins. The research team had previously demonstrated that the movement of the reaction center proteins during photosynthesis facilitates ...

Scientists give a hand(edness) to the search for alien life

... the research team built a device to shine light on plant leaves and bacteria, and then detect the polarized reflections from the organisms chlorophyll from a short distance away. The device detected chirality from both sources. The team intends to improve its detector so it can look at pond ...

Lohafex provides new insights on plankton ecology

... are potent greenhouse gases, others such as halogenated hydrocarbons contribute to stratospheric ozone depletion. By the end of the experiment, chlorophyll concentrations were in decline. By now the patch will have merged with its surroundings leaving behind no trace other than a swarm of well-fed ...

Plants grow bigger and more vigorously through changes in their internal clocks

... during the day, several-fold increases over their parents. The hybrids and polyploids exhibited increased photosynthesis, higher amounts of chlorophyll and greater starch accumulation than their parents, all of which led to their growing larger. Also, growth vigor was higher in allotetraploid ...

Mysterious microbe plays important role in ocean ecology

... it could feed nitrogen to its host and live on the carbon provided by the host," he said. Photosystem II is large complex of multiple proteins and chlorophyll molecules, but the team was unable to find any of the genes for the photosystem II core proteins. The genes for photosystem I appeared in the ...

Mysterious microbe may play important role in ocean ecology

... something missing in this organism's genome, and the genome sequencing confirmed that." Photosystem II is large complex of multiple proteins and chlorophyll molecules, but the team was unable to find any of the genes for the photosystem II core proteins. The genes for photosystem I appeared in the ...

AGU journal highlights: Nov. 11, 2008

... of this unprecedented loss on marine primary production, Arrigo et al. couple satellite-derived sea ice extents, sea surface temperatures, and marine chlorophyll concentrations to a primary production model parameterized for Arctic waters. They find that annual primary production in the Arctic has increased ...

Scientists use remote satellite imaging to predict outbreaks of infectious disease

... outbreaks have been linked with environmental factors, including sea surface temperature, ocean height, and biomass (this is estimated by measuring chlorophyll produced by plankton). Professor Rita R. Colwell and her team at the University of Maryland, College Park, have used remote satellite imaging to ...

Climate change causing significant shift in composition of coastal fish communities

... "It's hard to explain any other way." The shift in species composition also correlates with the winter North Atlantic Oscillation index and with chlorophyll concentrations, which declined by 50 percent, both of which are related to warmer sea temperatures. What do these changes mean for the future of ...

A model photochemical compass for bird navigation

... as a magnetic compass. Carotenoid is an organic pigment that occurs naturally in plants and other photosynthetic organisms. Porphyrin is similar to a chlorophyll molecule and exists in green leaves and red blood cells. Fullerene is composed entirely of carbon, and a spherical fullerene is known as a ....

Substantial improvement in essential cheap solar cell process

... solar energy over long distances, typically about 15-20 nanometres, to a location in which it is converted into chemical energy. This is because the chlorophyll molecules in their leaves are arranged in the best possible sequence. During her PhD, Annemarie Huijser attempted a partial recreation in solar cells ...

Iowa State professor's genome research published in the latest issue of Science

... It is a bridging species connecting back to when plants and animals began their evolutionary separation, so it contains traits of both. It produces chlorophyll and also flagella to help it move. Another reason the alga was sequenced is that it is both a simple organism and a classic genetic model ...

North America's northernmost lake affected by global warming

... the top two centimeters of the core, which correspond to the last 200 years, showed abrupt changes in the lakes algae population: during that period, chlorophyll a concentration, a pigment found in every species in the lake, increased by a factor of 500. A type of diatom typical of very cold environments also ...

New animal and plant species found in Vietnam

... 31 inchesalmost a yard in length. Three of the new orchid species are entirely leafless, a rarity even among orchids. Containing none of the chlorophyll or green pigment commonly found in plants, these orchids live on decaying matter like many fungal species. The other new plants include an aspidistra ...

Envisat captures first image of Sargassum from space

... The discovery was made using the MERIS maximum chlorophyll index (MCI) which provides an assessment of the amount of chlorophyll in vegetation to produce detailed images of chlorophyll per unit area. MERIS is uniquely suited for this ...

NASA predicts nongreen plants on other planets

... radiation during photosynthesis. Scientists have long known that the chlorophyll in most plants on Earth absorbs blue and red light and less green light. Therefore, chlorophyll appears green. Although some green color is absorbed, it is less than the ...

Harmful Algal Blooms monitored from space in Chile

... one death. Just like plants on land, algae employ green-pigmented chlorophyll for photosynthesis -- the process of turning sunlight into chemical energy. The chlorophyll collectively tints the colour of the surrounding water, providing a means ...

Research tracks whales by listening to sounds

... and ocean conditions. "We'll look at water temperature, salinity and even chlorophyll growth," Mellinger said. "Ultimately, what we hope is to be able to identify a certain water mass and know that it will lead to chlorophyll growth and an abundance of plankton, and that the whales will soon ...

Protein behind autumn color splendor identified

... In September the chlorophyll starts to disappear from the leaves of plants. This reveals the yellow ... autumn, but in our climate deciduous trees and other perennials lose their chlorophyll in the fall. The reason for this is that the proteins in the leaves ...

Scientists discover how plants disarm the toxic effects of excessive sunlight

... research scholars program. Cells that grow by photosynthesis use chlorophyll to absorb solar energy. The following NASA satellite image maps chlorophyll concentrations on land as well as in oceans, lakes and seas. This image ...

Researchers link ocean organisms with increased cloud cover and potential climate change

... are that we will see this in other places," he added. Nenes and Meskhidze used data from satellite observations to estimate the amount of chlorophyll in the ocean, the emission of isoprene and its connection to cloud formation. Before this new mechanism can be incorporated into global climate ...

Climate experts search for answers in the oceans

... through photosynthesis and convert it into organic carbon. This process is known as primary production. While individually microscopic, phytoplankton chlorophyll collectively tints the surrounding ocean waters, providing a means of detecting these tiny organisms from space with dedicated ocean colour sensors. ...

Detecting microalgae in coastal waters

... must monitor and characterize algal populations that change quickly over space and time. In vogue are fluorescence-based optical monitors that 'see' chlorophyll a, a plant pigment that is present in all algal species. However, these tools are less effective in turbid coastal waters and do not identify ...

DOE JGI finishes 100th microbial genome

... our functional genomics studies. This has allowed us to make remarkable progress in understanding sulfur and ferrous iron oxidation, carotenoid and chlorophyll biosynthesis, photosynthetic light harvesting, oxygen tolerance, and many other aspects of the physiology and metabolism of the green sulfur ....

Marine 'dead zone' off Oregon is spreading

... which are sending data in near real-time. In addition, a new underwater unmanned vehicle equipped with sensors to measure temperature, salinity, chlorophyll and dissolved oxygen is routinely sampling across central Oregon waters. During normal years, cold water rich in nutrients but low in oxygen ...

Iron critical to ocean productivity, carbon uptake

... to produce additional pigments that make ocean productivity appear more robust than it really is. As a result, past interpretations of satellite chlorophyll data may be inaccurate, the researchers say, and the tropical Pacific Ocean may photosynthesize 1-2 billion tons less atmospheric carbon dioxide than ...

New crop of technology reveals plant health

... camera to scan the entire crop canopy. It can automatically detect when individual or groups of plants are getting too hot. Another sensor detects chlorophyll fluorescence, which tells the system the rate at which the plant is absorbing energy. That reflects the current state of photosynthesis, itself a ...
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